I have the 5075e cab, but it's too soon to tell you about how well I like it. So far, so good. As of now, I only have around 10 hours on it. I have a FEL, forks, MX-8 cutter, 2nd rear scv and grapple
I looked at the 5085e also, but the price was about $8k more and out of my range. I also needed the ability to haul the tractor on a 14k trailer and felt the 85 with loaded tires, a rotary cutter and FEL was simply too large. The engine of the 85 was smoother and quieter, but it is also a tier IV. Also, it is a substantially larger tractor and weighs about 2k more.
The 5075e has 75/57 hp, the 5085e has 85/70 pto hp. The 85 comes with a much more comfortable seat, operator layout and 2 rear sets of rear hydraulics. The 75 has a seat with no adjustable backrest, a simpler and more basic operator layout and 1 set of rear hydraulics.
I believe the 85 is a better and more comfortable tractor if you have the money,it is not too large for what you want to do, and you don't mind the tier IV engine.